-17.05% is the change from 991 to 822
Calculation steps:
[( 822 - 991 ) ÷ 991] x 100 = -17.05%
Formula
Percentage change = [(822 - 991) / 991] x 100
Subtract the new number by the original number
822 - 991 = -169
-169 ÷ 991 = -0.1705348133198789
-0.1705348133198789 x 100 = -17.05%